Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to a football field
- Will pass within 10,720,031 km of Earth in 2019
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
2019 BK is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2019 BK as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2019 BK orbits the sun every 1,080 days (2.96 years), coming as close as 0.56 AU and reaching as far as 3.55 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 2019 BK is probably between 0.165 to 0.368 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.
The rotation of 2019 BK has been observed. It completes a rotation on its axis every 2.86 hours.
Close Approaches
2019 BK's orbit is 0.03 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.
2019 BK has 9 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Jan. 13, 2019 | 10,720,031 | 20.198 |
| July 6, 2033 | 21,622,595 | 26.175 |
| Jan. 15, 2069 | 10,163,870 | 20.782 |
| July 5, 2080 | 20,441,334 | 26.247 |
| Jan. 29, 2107 | 23,236,332 | 27.036 |
| July 4, 2118 | 27,373,358 | 27.865 |
| July 8, 2153 | 15,870,934 | 25.453 |
| Jan. 23, 2180 | 8,974,785 | 23.315 |
| July 8, 2191 | 22,454,771 | 26.522 |
Images and Observations
2019 BK's orbit is determined by observations dating back to Jan. 29, 2016. It was last officially observed on Feb. 9, 2022. The IAU Minor Planet Center records 155 observations used to determine its orbit.
Accessibility and Exploration
This asteroid is not considered a viable target for human exploration by the NHATS study.Similar Objects
These objects have orbits that share similar characteristics to the orbit of 2019 BK:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.055 AU
- Eccentricity: 0.7282
- Inclination: 4.13°
- Longitude of Ascending Node: 264.47°
- Argument of Periapsis: 121.14°
- Mean Anomaly: 225.07°
Physical Characteristics
- Diameter: ~0.213 km
- Magnitude: 21.04
Derived Characteristics
- Orbit Period: 1,080 days (2.96 years)
- Avg. Orbit Speed: 20.70 km/s
- Aphelion Distance: 3.55 AU
- Perihelion Distance: 0.56 AU
- Rotation Period: 2.86 hours
Map Comparison
Orbit Simulation
Sky Map
The position of 2019 BK is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.
Size Rendering
The below comparison is an artistic rendering that uses available data on the diameter of 2019 BK to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.
